"To" is just a shorthand way of saying "ask these other entities to pray for us".
I think some people actually pray TO them. It’s a sticking point when talking to people of other Christian faiths.
I forgot how to post links, but this site is for a Novena in honor of Padre Pio da Pietrelcina. It has nine days of prayers to the deceased Mr. Pio.
Here are some highlights:
"Padre Pio of Pietrelcina, loving father, you bore the visible wounds of Our Lord Jesus Christ on your body.You carried the Cross for all humanity."
"You were gifted every day with the graces and comforts that only [the blessed mother] can give."
"Padre Pio of Pietrelcina, holy father, you fulfilled the salvation plan of God and offered yourself as a victim to free all people from their bondage to Satan."
"How many of your children were acquired at the price of your blood!"
"...at the moment of our death may we encounter you waiting for us at the Gates of Paradise."
"teach us ...devotion for...Mary ...our Heavenly Mother, that through Her intercession we may more easily approach the Savior"